What is this construct in JavaScript?

Question

JavaScript

Hello, I came across such a code, you need to figure out what is happening in it.
I don’t understand what kind of constructions are in working with variables

e = String[_[343]](123);
m = s[_[545]](c, 5) + s[_[166]](S, l, f, u) + d + t[S] + O[A] & 1344967135;

As I understand it, this is obfuscated code, are there any deobfuscators of such code? If there is, which ones?